package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额统计
     *
     * @param begin end
     * @return TurnoverReportVO
     */
    @Override
    public TurnoverReportVO getReport(LocalDate begin, LocalDate end) {

        //存放日期
        List<LocalDate> list = new ArrayList<>();

        list.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            list.add(begin);
        }

        //存放营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : list) {
            //查询date对应的营业额
            LocalDateTime beginDateTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endDateTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("begin", beginDateTime);
            map.put("end", endDateTime);
            map.put("status", Orders.COMPLETED);

            Double turnover = orderMapper.sumByMap(map);

            turnover = turnover == null ? 0.0 : turnover;

            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(list, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 获取用户数据报表
     *
     * @param begin end
     * @return UserReportVO
     */
    @Override
    public UserReportVO getUserReport(LocalDate begin, LocalDate end) {

        //存放日期
        List<LocalDate> list = new ArrayList<>();

        list.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            list.add(begin);
        }

        //用户信息
        //每日新增新用户
        List<Integer> userList = new ArrayList<>();
        //总用户
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : list) {
            LocalDateTime beginDateTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endDateTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endDateTime);

            //总用户数量
            Integer Duser = userMapper.countByMapTime(map);
            totalUserList.add(Duser);

            //新增用户数量
            map.put("begin", beginDateTime);
            Integer i = userMapper.countByMapTime(map);
            userList.add(i);

        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(list, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(userList, ","))
                .build();
    }

    /**
     * 订单数据报表
     *
     * @param begin end
     * @return OrderReportVO
     */
    @Override
    public OrderReportVO getOrderReport(LocalDate begin, LocalDate end) {

        //存放日期
        List<LocalDate> list = new ArrayList<>();

        list.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            list.add(begin);
        }

        //查询订单总数和有效订单数
        ///每日
        List<Integer> dayOrderList = new ArrayList<>();
        List<Integer> dayEffOrderList = new ArrayList<>();

        for (LocalDate date : list) {
            LocalDateTime beginDateTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endDateTime = LocalDateTime.of(date, LocalTime.MAX);

            //每天订单总数
            Integer dayOrders = getDayOrders(beginDateTime, endDateTime, null);
            dayOrderList.add(dayOrders);

            //每天有效订单总数
            Integer dayOrders1 = getDayOrders(beginDateTime, endDateTime, Orders.COMPLETED);
            dayEffOrderList.add(dayOrders1);

        }

        //总数
        Integer totalOrderCount = dayOrderList.stream().reduce(Integer::sum).get();

        Integer validOrderCount = dayEffOrderList.stream().reduce(Integer::sum).get();

        //订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }


        return OrderReportVO.builder()
                .dateList(StringUtils.join(list, ","))
                .orderCountList(StringUtils.join(dayOrderList, ","))
                .validOrderCountList(StringUtils.join(dayEffOrderList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    //top10
    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {

        LocalDateTime beginDateTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endDateTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> top = orderMapper.top10(beginDateTime, endDateTime);

        List<String> name = top.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(name, ",");

        List<Integer> number = top.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(number, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    //根据日期和状态查询订单
    private Integer getDayOrders(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap<>();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);

        return orderMapper.sumOrdersByMap(map);
    }
}
